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This enables, among other things, testing with the QEMU virt machine. To build an XIP kernel for the QEMU virt machine, configure the the kernel as desired and apply the following configuration ``` CONFIG_NONPORTABLE=y CONFIG_XIP_KERNEL=y CONFIG_XIP_PHYS_ADDR=0x20000000 CONFIG_PHYS_RAM_BASE=0x80200000 CONFIG_BUILTIN_DTB=n ``` Since the QEMU virt flash memory expects a 32 MB file, the built image must be padded. For example, with `truncate -s 32M arch/riscv/boot/xipImage` The kernel can be started using the following command in QEMU (v8+) ``` qemu-system-riscv64 -M virt,pflash0=pflash0 \ -blockdev node-name=pflash0,driver=file,read-only=on,\ filename=arch/riscv/boot/xipImage <optional parameters> ``` Signed-off-by: Frederik Haxel <haxel@fzi.de> Link: https://lore.kernel.org/r/20231212130116.848530-4-haxel@fzi.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.